Mama G's Kitchen, on Washington Street in Quincy, is a family-owned restaurant that took over the space formerly occupied by Jimmy's House of Pizza in Quincy Point. The kitchen turns out substantial plates: big pizzas, crispy chicken wings, chicken tenders, stacked subs including an Italian sub, and steak and cheese sandwiches. The restaurant opens Wednesday through Saturday afternoons into late evening, with Sunday hours starting at 2 p.m.